Paper making machine wringer apparatus



Feb. 28, 196? c. P. M HUGH PAPER MAKING MACHINE WRINGER APPARATUS FiledMa rch 27, 1964 4 Sheets-Sheet 1 INVENTOR CHAFL ES P Mchl/Gf/ ATTOZ/VEVSFeb. 28, 1967 C. P. M HUGH PAPER MAKING MACHINE WRINGER APPARATUS FiledMarch 27, 1964 4 Sheets-Sheet 2 W [M 1 9am I 1 I I l INVENTOR.

CHAALES P Ma HUGH A 770/?NE ys Feb; 28, 1967 c. P. MCHUGH 3,306,814

PAPER MAKING MACHINE WRINGER APPARATUS Filed March 27, 1964 4Sheets-Sheet 3 INVENTOR CHARLES I? Mr HUGH ATTOF/VEXS Feb. 28, 1967 c.P. M HUGH 3,306,814

PAPER MAKING MACHINE WRINGER APPARATUS Filed March 27, 1964 4Sheets-$heet 4 iLJ INVENTOR CHARLES E MC HUGH United States PatentOfifice Patented Feb. 28, 1967 3,306,814 PAPER MAKEIG MACHINE WRINGERAPPARATUS Charles P. McHugh, Ridgewood, N.J., assiguor toRaybestos-Manhattan, Inc., Passaic, N.J., a corporation of New JerseyFiled Mar. 27, 1964, Ser. No. 355,182 Claims. (Cl. 162-358) Thisinvention relates to a press roll system or wringer apparatus for papermaking machines.

In paper making machines, large rubber covered steel rolls are used asthe top press rolls in the press system for squeezing out or expellingwater from a wet woolen felt carrier holding a web of paper which ismoved and pressed between the press rolls. These rubber covered pressrolls are massive and for modern large paper making machines areexcessively heavy. It is not unusual to have some of these press rollsweigh 50,000 lbs. or more. When the rubber which is bonded to the steelroll needs replacement, which is quite frequent, the steel roll has tobe removed from the machine and transported to the rubber manufacturerwho specializes in this work of recovering the roll with rubber.

Recovering such a press roll presents a number of difficult and costlyproblems. It is a very difficult task to remove such heavy rolls from apaper making machine and also to replace them with recovered rolls. Inmany cases rolls requiring recovering may have to be sent hundreds ofmiles to and from the rubber factory where such recovering is processed,and the cost of transportation for this purpose is inordinately large.This operation itself may require several months to complete. Inaddition, it is always necessary for the paper mill to have at least onespare rubber covered roll for each position on the machine in storage atthe paper mill for quick replacement either when there is need of arubber recovering job or in case of an accidental breakdown. The cost ofthe large cast iron or steel roll bodies is usually many times the costof the rubber covering; and consequently a paper mill has considerableinvestment tied up in spare rolls simply as insurance against areplacement-need or accidental breakdown.

The present invention relates to a press roll system or wringerapparatus for a paper making machine which provides an effectivesolution for these stated problems.

In the wringer apparatus of the present invention I have devised, inlieu of the customary top rubber press roll in the press roll system, atop press mechanism which embodies a removable and replaceable rubberblanket or belt as the means which is mated to the bottom press roll andbetween which a wet carrier holding a web of paper is adapted to bemoved and pressed for expelling water from the paper carrier and web.The said top press mechanism of the invention further embodies astructure and design operable to permit effective operation of thewringer apparatus in use and to enable the ready removal of the rubberblanket or belt from the apparatus when such belt is expended and theready replacement therefor of a new rubber blanket or belt.

With the provision of the novel top press mechanism of the presentinvention the problems which are now being encountered are effectivelysolved since:

(1) The replacement rubber blanket or belt eliminates the need for heavyreplaceable top rubber press rolls and substitutes in their placereplaceable reenforced rubber blanket or belt;

(2) The demounting and the replacement of the rubber blanket or belt isa relatively simple and inexpensive procedure with the top pressmechanism of the present invention, thereby eliminating the larger costof demplunting and remounting heavy rubber covered press ro s;

(3) The expense of shipping heavy rolls to and from the rubberreplacement factory is eliminated; and the rubber blanket or belt itselfis an expendable item and requires no back and forth shipment;

(4) Since the cost of these blankets or belts is low compared to rubbercovered rolls, paper mills may keep more of such blankets or belts instorage to eliminate the possibility of a shutdown due to not having arubber roll replacement; and

(5) Due to the easy replacement and the low cost of replacement of arubber blanket or belt, a paper mill can afford to have severalhardnesses of belts for each position on its paper making machines, andmay change a belt when a run is changed from one type of paper toanother.

To the accomplishment of the foregoing objects and such other objects asmay hereinafter appear the invention relates to a wringer apparatus fora paper making machine as sought to be defined in the appended claimsconsidered together with the following description of the invention andthe accompanying drawings, in which- FIG. 1 is a right side elevationalview of the paper making machine wringer apparatus featuring the toppress mechanism of the present invention;

FIG. 2 is a front elevational view of the right side of the saidapparatus with parts shown in section;

FIG. 3 is an elevational view drawn to an enlarged scale of apparatusparts depicted in FIGS. 1 and 2, showing the mounting for the lower rolland for a set of intermediate rolls of the top press mechanism and themeans for moving the lower roll;

FIG. 4 is a plan view drawn to an enlarged scale of apparatus partsdepicted in FIGS. 1 and 2, showing the mounting of the set ofintermediate rolls of the top press mechanism and the means for movingthe same;

FIG. 5 is a view of FIG. 4 shown to a further enlarged scale and takenin cross-section in the plane of the line 55 of FIG. 4;

FIG. 6 is a side elevational diagrammatic view of the rolls and therubber blanket or belt of the top press mechanism showing these parts inthe position for press engagement with the bottom press roll of thewringer apparatus;

FIG. 7 is a view similar to FIG. 6 showing said parts in a position whendisengaged from the bottom press roll for removal of an expended blanketor belt or for replacement of a new blanket or belt;

FIG. 8 is a front elevational view, largely diagrammatic, of a completewringer apparatus when in operation; and

FIG. 9 is a view similar to FIG. 8, depicting the manner of removing anexpended rubber blanket or belt or of replacing a new rubber blanket orbelt.

Referring now more in detail to the drawings and having reference firstto FIGS. 1, 2, 6 and 7 thereof, the wringer apparatus or press rollsystem of the invention comprises in its essential structural elements abottom press roll generally designated as 10 and a mating top pressmechanism generally designated as 12, between which, as depicted in FIG.6, a wet carrier 14 (such as a woolen felt) holding in formation a webof paper 16 is adapted to be moved and pressed for expelling water f! omthe carrier and paper web.

The top press mechanism 12 comprises an upper roll 18, a lower roll 20,a rubber blanket 22 trained over the upper and lower rolls andpreferably a set of intermediate rolls 24 arranged between andengageable with the said upper and lower rolls as best depicted in FIGS.6 and 7 of the drawings. In the organized apparatus the lower roll 20 ismovable relatively to the upper roll 18 in the directions indicated bythe arrow 26 (F165. 6 and 7) to effect movement of the lower roll towardand away from the bottom press roll 10 for respectively pressengagingthe rubber blanket 22 with (FIG. 6) and disengaging the rubber blanketfrom press engagement with the bottom press roll 10. The intermediaterolls 24 are movable in the opposite directions indicated by the arrow28 (see FIGS. 6 and 7) to apply compression between and to the upper andlower rolls 18 and 28 when the parts are moved to the condition shown inFIG. 6 of the drawings and to relieve compression from said upper andlower rolls when the parts are moved to the condition shown in FIG. 7 ofthe drawings. The rolls 18 and of the top press mechanism are steelrolls; and the lower press roll 10 may be either a steel roll or a hardrubber covered steel roll.

The bottom press roll 10 is mounted for rotation in bearing housings 30bolted as at 32 to a supporting framework 34 for the apparatus, oppositeshaft ends 36 of the bottom press roll being journalled in bearings 38mounted in the bearing housings.

The upper roll 18 of the top press mechanism 12 is mounted for rotationin the bearing housings 40 (one at each end of the apparatus), eachbearing housing being bolted as at 42 to a carriage 44, the oppositeshaft ends 46 of the upper roll being journalled in bearings in thebearing housings 40. The carriage 44 at each end of the machine ismounted on a main support 48 fixed in turn to the supporting framework34; and at one end of the apparatus, such as at the right end best shownin FIG. 1 of the drawings, the carriage 44 is mounted as at 50 forpivotal motion on the said main support 48 for reasons that will appearfurther hereinafter.

The lower roll 20 is preferably supported on and from the upper roll 18and more particularly from the shaft ends 46 thereof. The supportprovided for this purpose comprises for each side of the apparatus, andas best shown in FIG. 3 of the drawings, a block 52 mounted on and hungfrom a shaft end 46 of the upper roll, to which block is connected (foreach side of the apparatus) a bearing 54 for journalling the shaft end56 of the lower roll 20. The bearing 54 is connected to the block 5-2 bymeans of rods 58 attached to a bar 60 in turn affixed to rods 62 whichmovably extend through bores 64 in the block 52 and which in turn aresecured to a bar 66 surmounting the block 52.

The means for moving the lower roll 20 in the manner already describedis associated with and carried by the support for the lower roll andparticularly the block 52 thereof. Such means comprises, for each sideof the apparatus, a hand wheel-screw adjusting means generallydesignated as 68 for elevating and lowering the bar 66 and therebycorrespondingly moving the bearings 54 and the lower roll journalledtherein. This means 68 comprises more particularly a hand wheel 70rotatable on a threaded bolt 72 splined at 74 to the block 52, the shaft'76 of said hand wheel being formed with a flanged part 78 engageablewith the bar 66 (for lowering the roll 20) and engageable with a flangedring 80 bolted as at 82 to the bar 66 for elevating the roll 20.

The intermediate rolls 24 are also preferably mounted on the support 52which is mounted on and depends from the upper roll. To this end theintermediate rolls 24 are carried by a mounting structure generallydesignated as 84, the opposite ends of which are provided with afloating journal block 86 slidable on the rods 58 connected to saidsupport. Means for moving the intermediate rolls in the mannerheretofore referred to (in connection with FIGS. 6 and 7 of thedrawings) are carried by the said mounting structure 84.

The mounting structure for the intermediate rolls and the means formoving the same are shown in detail in F165. 4 and 5 of the drawings. Aseries of rolls 24 spaced along the width of the apparatus alternatinglyon opposite sides of a vertical medial plane of the apparatus are eachmounted for free rotation on a wedge frame 88, the resulting series ofwedge frames 88, 88 being in contiguous relationship, each wedge framebeing movable in the directions indicated by the arrow 9% for moving theopposite sets of rolls 24 in the manner heretofore indicated. Each wedgeframe fixedly carries a cam block 92 having a cam face 92 Cooperatingwith the series of cam blocks 92, 92 there is provided a cam member 94having a series of oppositely directed cam faces 96, 96 engaging the camfaces 82 92 of the successive cam blocks 92, which cam member 94 isslidably movable in the wedge frame 88. Means is provided for slidablymoving the cam member 94, such means comprising a threaded rod 98atfixed as at 100 to the cam member 94, the said threaded rod 98 beingin threaded engagement with a hand wheel 1G2 journalled by means of thethrust ball bearings 184 mounted in an end bearing 1% in turn afiixed tothe floating journal block 86. With this construction the rotation ofthe hand wheel 182 slidably moves the cam member 94 thereof, and therebythrough the engagement of the cam faces 96 thereof with the cam faces ofthe cam blocks 92 moves the opposite sets of intermediate rolls 24, 24into and out of compression engagement with the upper and lower rolls 18and 26 in the manner heretofore described in connection with FIGS. 6 and7 of the drawings. Preferably each cam block 92 is mounted on each wedgeframe 88 for close adjustment thereon by means of the cam blockadjusting screws 108, 108, measuring graduations being provided for camblock location.

The carriage 44 at the right side of the apparatus (FIG. 1) is pivotallymounted at 50 as heretofore described on a main support 48. (The pivotalmounting of the carriage may be incorporated for both sides of theapparatus if desired.) Means is provided for moving the carriage 44about its pivotal mounting to vary the pressure at the engagement nip ofthe blanket or belt 22 and such means may comprise an operating rod 112connected to a lever extension 114 formed with the carriage 44, saidoperating rod being connectable to a hydraulic cylinder (not shown). Tostabilize the mounting for the lower and intermediate rolls the bearing54 for the lower roll shaft 56 is preferably connected to the carriage44 by an adjustable linkage 116 (see FIG. 1).

The pivotal mounting for the carriage 44, particularly at the right sideof the apparatus, performs another office which is to enable thedemounting of an expended rubber blanket or belt from and the mountingof a new rubber blanket or belt on the top press mechanism of theapparatus with facility. This is depicted in FIGS. 8 and 9 of thedrawings. FIG. 8 depicts the parts of a complete wringer apparatus(largely in diagrammatic form) when the same is in operation, namelywith the rubber blanket or belt 22 of the top press mechanism 12 inpress engagement with the bottom roll 1t FIG. 9 shows the condition orposition of these parts of the apparatus when an expended blanket isremoved from or a new rubber blanket or belt is replaced on the toppress mechanism. To accomplish this, referring now to FIG. 1 of thedrawings, the upper roll 18 is unbolted, by removing the bolts 42, thelinkage 116 is loosened, and the carriage 44 is pivotally moved (aboutninety degrees from its position shown in FIG. 1) to a clearingposition. The shaft 46 of the upper roll 18 is then received into oneend of a tubular member 118, the opposite end ofwhich is raised orlifted by a suspending device 120, and with the lower roll 20 and theintermediate rolls 24 moved to their FIG. 7 position, the rubber blanket22 may be demounted by being slipped from the position shown in FIG. 7to that shown in FIG. 9 onto the tubular member 118 as shown in FIG. 9.Similarly in mounting a new blanket, the rubber blanket 24 is placed inposition on the tubular member 118, the same being then lifted by thesuspending device 120 and thereafter moved into position onto the toppress mechanism, after which the carriage 44 is returned to its positionfor mounting the upper roll.

The use and operation of the press roll system or wringer apparatus ofthe present invention and the many advantages thereof will be fullyapparent from the above detailed description thereof. It will beapparent that changes may be made in the apparatus without departingfrom the spirit of the invention defined in the following claims.

I claim:

1. A paper making machine wringer apparatus having a bottom press rolland a mating top press mechanism between which a wet carrier holding aWeb of paper is adapted to be moved and pressed for expelling water fromthe carrier and paper web, said top press mechanism comprising an upperroll, a lower roll mounted for movement relatively to the upper roll, arubber blanket trained over the said upper and lower rolls, means forpositively lowering and elevating the lower roll relatively to the upperroll to effect movement of the lower roll toward and away from thebottom press roll for respectively press-engaging the rubber blanketwith and disengaging the rubber blanket from the bottom press roll,movement of the lower roll away from the bottom press roll freeing saidrubber blanket for removal from said top press mechanism, and means forapplying compression between and to the upper and lower rolls when thelower roll is in a press-engaging position with respect to the rubberblanket and to relieve compression from between said upper and lowerrolls when the lower roll is in a position for disengaging the rubberblanket.

2. In the paper making machine wringer apparatus of claim 1, a supportfor journalling the said lower roll, said support being mounted on andhung from the upper roll, the means for moving the lower roll beingcarried by said support.

3. In the paper making machine wringer apparatus of claim 1, a mainframework support, a carriage in which the upper roll is journalled,said carriage being movably mounted on said main support toward and fromthe bottom press roll and means connected to said carriage for movingthe same.

4. The paper making machine wringer apparatus of claim 3, in which saidcarriage is pivotally mounted on said main support, the carriage beingmovable about its pivotal mounting away from the upper roll so as toclear said roll journalled therein.

5. In the paper making machine wringer apparatus of claim 3, means forsupporting said upper roll independently of said carriage whereby upon aclearing movement of said carriage away from its roll mounting position,removal is permitted of the rubber blanket from the top press mechanismfor its replacement.

6. A paper making machine wringer apparatus having a bottom press rolland a mating top press mechanism between which a wet carrier holding aweb of paper is to be moved and pressed for expelling water from thecarrier and paper web, said top press mechanism comprising an upperroll, a lower roll mounted for movement relatively to the upper roll,intermediate rolls arranged between and engageable with said upper andlower rolls, a rubber blanket trained over the said upper and lowerrolls, means for positively lowering and elevating the lower rollrelatively to the upper roll to effect movement of the lower roll towardand away from the bottom press roll for respectively press-engaging therubber blanket with and disengaging the rubber blanket from the bottompress roll, and means for moving the intermediate rolls to applycompression between and to the upper and lower rolls when the lower rollis in a press-engaging position with respect to the rubber blanket andto relieve compression from said upper and lower rolls when the lowerroll is in the position for disengaging the rubber blanket, movement ofthe lower roll and the intermediate rolls away from theirpress-engagement and compression positions freeing said rubber blanketfor removal from said top press mechanism.

7. In the paper making machine wringer apparatus of claim 6, a supportmounted on the upper roll, means mounting the lower roll on saidsupport, and means mounting the intermediate rolls on said support.

8. The paper making machine wringer apparatus of claim 7, in which eachof said mounting means is movable on said support.

9. In the paper making machine wringer apparatus of claim 6, a supportmounted on the upper roll, a bearing mounting the lower roll on saidsupport, the means for moving the lower roll being mounted on saidsupport and being connected to said bearing to move the same.

10. In the paper making machine wringer apparatus of claim 6, a supportmounted on the upper roll, means mounting the intermediate rolls on saidsupport, the means for moving the intermediate rolls being carried bysaid mounting means.

References Cited by the Examiner UNITED STATES PATENTS 412,656 10/1889ONeill l62-360 FOREIGN PATENTS 1,004,343 4/ 1947 France.

DONALL H. SYLVESTER, Primary Examiner.

J. H. NEWSOME, Assistant Examiner.

1. A PAPER MAKING MACHINE WRINGER APPARATUS HAVING A BOTTOM PRESS ROLLAND A MATING TOP PRESS MECHANISM BETWEEN WHICH A WET CARRIER HOLDING AWEB OF PAPER IS ADAPTED TO BE MOVED AND PRESSED FOR EXPELLING WATER FROMTHE CARRIER AND PAPER WEB, SAID TOP PRESS MECHANISM COMPRISING AN UPPERROLL, A LOWER ROLL MOUNTED FOR MOVEMENT RELATIVELY TO THE UPPER ROLL, ARUBBER BLANKET TRAINED OVER THE SAID UPPER AND LOWER ROLLS, MEANS FORPOSITIVELY LOWERING AND ELEVATING THE LOWER ROLL RELATIVELY TO THE UPPERROLL TO EFFECT MOVEMENT OF THE LOWER ROLL TOWARD AND AWAY FROM THEBOTTOM PRESS ROLL FOR RESPECTIVELY PRESS-ENGAGING THE RUBBER BLANKETWITH AND DISENGAGING THE RUBBER BLANKET FROM THE BOTTOM PRESS ROLL,MOVEMENT OF THE LOWER ROLL AWAY FROM THE BOTTOM PRESS ROLL FREEING SAIDRUBBER BLANKET FOR REMOVAL FROM SAID TOP PRESS MECHANISM, AND MEANS FORAPPLYING COMPRESSION BETWEEN AND TO THE UPPER AND LOWER ROLLS WHEN THELOWER ROLL IS IN A PRESS-ENGAGING POSITION WITH RESPECT TO THE RUBBERBLANKET AND TO RELIEVE COMPRESSION FROM BETWEEN SAID UPPER AND LOWERROLLS WHEN THE LOWER ROLL IS IN A POSITION FOR DISENGAGING THE RUBBERBLANKET.